"REPLACE/INSERT IGNORE/UPDATE IGNORE doesn't work"
  Federated does not record neccessary HA_EXTRA flags in order to
  support REPLACE/INSERT IGNORE/UPDATE IGNORE.
  Implement ::extra() to capture flags neccessary for functionality.
New function append_ident() to better escape identifiers consistantly.


mysql-test/r/federated.result:
  test for bug29019
mysql-test/t/federated.test:
  test for bug29019
sql/ha_federated.cc:
  Bug29019
    Federated does not record neccessary HA_EXTRA flags in order to
    support REPLACE/INSERT IGNORE/UPDATE IGNORE.
    Implement ::extra() to capture flags neccessary for functionality.
  New function append_ident() to better escape identifiers consistantly.
sql/ha_federated.h:
  bug29019
    add 2 member values to ha_federated class
      ignore_duplicates and replace_duplicates.
    add 1 member method to ha_federated class
      extra()